3com WX1200 3CRWX120695A Benutzerhandbuch

C

HAPTER

 19: C

ONFIGURING

 

AND

 M

ANAGING

 S

ECURITY

 ACL

S

„

Type-of-service level is 12 (minimum delay plus maximum throughput).

„

Precedence is 7 (network control).

WX1200# set security acl ip acl-3 permit icmp 192.168.1.3 
0.0.0.0 192.168.1.4 0.0.0.0 type 11 code 0 precedence 7 
tos 12 before 1 hits

The before 1 portion of the ACE places it before any others in the ACL, 
so it has precedence over any later ACEs for any parameter settings that 
are met. 

For more information about changing the order of ACEs or otherwise 
modifying security ACLs, see “Modifying a Security ACL” on page 394. 
For information about TOS and precedence levels, see the 

. For CoS details, see “Class of 

ICMP includes many messages that are identified by a type field. Some 
also have a code within that type. Table 32 lists some common ICMP 
types and codes. For more information, see 

Table 32   Common ICMP Message Types and Codes

Echo Reply (0)

None

Destination Unreachable (3)

„

Network Unreachable (0)

„

Host Unreachable (1)

„

Protocol Unreachable (2)

„

Port Unreachable (3)

„

Fragmentation Needed (4)

„

Source Route Failed (5)

Source Quench (4)

None

Redirect (5)

„

Network Redirect (0)

„

Host Redirect (1)

„

Type of Service (TOS) and Network Redirect 
(2)

„

TOS and Host Redirect (3)

Echo (8)

None